Process and formula for tanning hides.



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' RUFUS N. MOORE, 0F THORP SPRING, TEXAS.

PROCESS AND FORMULA FOR TANNING HIDES.

No Drawing.

To all whom it may concern:

Be it known that 1, Burns N. Moons, a

citizen of the United States of America, re-

siding at 'Thorp Spring, in the county of Hood and State of Texas, have invented a certain new and useful Process and Formula for Tanning Hides, of which the following is a specification.

The present invention relates to a new and useful composition of matter or formula to be used in tanning and dressing hides. An object of this invention and discovery is to provide an effective tanning solution which will be comparatively inexpensive to manufacture, simple in its use and application and have great penetrating powers and capable of tanning hides with less time consumed than present day methods, and one which will produce a leather with its fiber vitality preserved and invigorated to such an extent that the finished product will maintain a durable pliability and resistance to weather attacks. A further object is to provide a tanning solution which will incorporate certain elements to impart to the finished leather a sweet smelling odor of lasting quality.

With the above and other objects in view the invention has relation to a certain combination and composition of ingredients going to form a tanning solution as described in the following specification and pointed out in the appended claim.

Referring more in particular to the ingredients of the solution and the proportions which are most effective in accomplishing the desired results, I use the several elements or ingredients in the following proportion name gum gambier, two pounds, and onehalf pound of alum, one plnt of vinegar, one ounce of fluid extract of white oak bark, one pound of nitrate of sodium, one ounce of fluid extract of poke root. and six ounces of perfume oil. This oil may be any oil having a pleasant odor and capable of absorption by the hide, such as oil or Wintergreen, or peppermint, or any of the esters of salicylic acid. The above described components are thoroughly dissolved in a suitable quantity of Water which will preferably be raised in temperature to a luke warm degree. The above recited proportions are worked out and given for the tanning of a small size hide and should be proportionately increased for larger hides over the size and weight of Specification of Letters Patent.

Patented July 2, rare.

Application filed July 19, 1917. Serial No. 181,578.

a calf hide. The foregoing mixture should be thoroughly admixed together and so thoroughly dissolved that a perfect homogeneity ofingreolients is secured.

In the use of my tanning solution I first cause the thorough removal of the hair from the hide by any effective method such as the use of lime water. A lime solution properly administered to a green hide will effectively loosen and cause the hair to slip from the pelt or hide. The fatty and glutinous parts and all animal matter will next be pared and removed from the hide to prepare same for immersion in the tanning solution. The hide will also undergo a thorough soaking and washing in several changes of fresh water until all lime particles are removed therefrom.

The hide or pelt is next immersed in any suitable vessel with the tanning solution and allowed to remain immersed till tanned which requires a varying period of time dependent upon the size and age of the hide. From two to ten days is usually required to tan and finish a hide, this time dependent upon the conditions of the hide in thickness and weight.

The gum gambier combined with the fluid extract of white oak bark serves as the tan ning and coloring agent, the chemical properties of each setting up a discoloring action through the ores of the hide. The alum hastens the disintegrationand removal of the glue and minute animal and fatty matter from the pores of the hide, while the vinegar serves to counteract any hardening tendency which the alum may impart to the leather during its tanning period. The fluid extract of poke root is used to strengthen and toughen the leather and thus increase the value of the finished product. Nitrate of sodium serves to keep the pores of the hide well open while in the solution thus permitting thorough penetration of the several agents active in the tanning process, and finally the perfume oil imparts a lasting agreeable odor to the finished product.

The hide is removed after the tanning agent has ceased activity on the parts and dried in any suitable manner, after which it is oiled with any suitable leather preservative such as fish oil. The leather is then subjected to a thorough breaking, kneadin and rolling action which renders the leatl ier soft and pliable and a perfect lllllll ket.

perfection and smoothness of finish clOSe-all pores thus holding the oils and other preservatives in the leather.

The invention and disclosed tanning formula is presented to include all changes in proportion and compositlon as may be con- Copies of this patent may be obtained for product-completed'and ready for the marstrued to fall within the meaning of the following claim:

A tanning solution comprising the several constituents in the proportions named: two pounds of gum gambier, one-half pound of alum, one pint of vinegar, one ounce of fluid extract of white oak bark, one pound of nitrate of sodium, one ounce of fluid extract. of Poke root, and perfume oil.

In testimony whereof I aflix my hand.

RUFUS N. MOORE.

five cents each, by addressing the Commissioner of Patents, Washington, D. O.

and to 

